USPTO Patents Application 10501512

Application No,: 10/501,512

AMENDMENTS TO THE CLAIMS

1. (Currently Amended) An optical waveguide module, comprising:

an optical circuit, constituted by a substrate and an optical waveguide formed on said
substrate and having a groove formed at a predetermined inclination angle 0 (0°<9) with respect
to the vertical axis

perpendicular to the optical axis of said optical waveguide so as to cross a predetermined
portion of said optical waveguide,

a reflection filter that is installed on the inside of said groove of said optical circuit
including a portion where signal light transmitted through said optical waveguide passes through,
and that reflects part of said signal light according to a specific reflectivity, and

a photodetector that detects reflected light of said signal light reflected by said reflection
filter, wherein

said groove of said optical circuit is formed such that said reflection filter, installed on the
inside of said groove, reflects part of said signal light as said reflected light to the top surface
side of said optical circuit and

said photodetector is arranged such that said reflected light is made incident onto the light
incident face thereof at a predetermined angle with r e sp e ct thereto between the light incident
face and the light incident direction, within a range of 80°-90° .

2. (Original) The optical waveguide module according to claim 1, wherein said
optical circuit is a planar optical waveguide type optical circuit including an optical waveguide
of a planar optical waveguide type formed as said optical waveguide on said substrate.

WDC99 1236183-1.050212.0604

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Application No.: 10/501,512

3. (Original) The optical waveguide module according to claim 1, wherein said
optical circuit is an optical circuit including optical fiber fixed as said optical waveguide on said
substrate.

4. (Original) The optical waveguide module according to claim 1, further
comprising a mounting member disposed on the top side of said optical circuit for mounting said
photodetector on the photodetector mounting face thereof, wherein

said mounting member is disposed with said photodetector mounting face being
obliquely inclined at an angle of a (0°<a<90°) with respect to the top surface of said optical
circuit such that said reflected light is made incident onto said light incident face of said
photodetector at a predetermined angle.

5. (Original) The optical waveguide module according to claim 1, further
comprising an optical path changing means for changing the light path of said reflected light to a
light path effecting incidence onto said light incident face of said photodetector at a
predetermined angle with respect thereto.

6. (Original) The optical waveguide module according to claim 5, further
comprising a mounting member disposed on the top side of said optical circuit for mounting said
photodetector on the photodetector mounting face thereof, wherein

said optical path changing means is a reflection mirror formed on a predetermined face of
said mounting member.

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Application No.: 10/501,512

7. (Original) The optical waveguide module according to claim 6, wherein said
reflection mirror is a total reflection mirror.

8. (Original) The optical waveguide module according to claim 1, wherein said
photodetector is mounted on the top surface of said optical circuit, and

said light incident face of said photodetector is obliquely inclined at an angle B
(0°<6<90°) with respect to the top surface of said optical circuit such that said reflected light is
made incident onto it at a predetermined angle.

9. (Original) The optical waveguide module according to claim 8, wherein a light
receiving portion of said photodetector is, viewed from the light path of said reflected light,
disposed at a position opposite to said light incident face.

10. (Original) The optical waveguide module according to claim 1, wherein said
optical circuit has N (N is a plural number) optical waveguides as said optical waveguide, and

a photodetector array having N photodetectors corresponding to said N optical
waveguides is provided as said photodetector.

11. (Original) The optical waveguide module according to claim 1, wherein a coat
film for preventing the reflection of the light within a predetermined wavelength band is formed
on said light incident face of said photodetector.

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